270 >. MONOCOTYLEDONEJE. VOSSIA, 
. II hyalina, binervis, paleam similem floremque c? fovens ; IV* hyalina, 
tenuissime 3-nervis, ejus palea binervis. Lodieulze magnse, late cunea- 
tæ, subbicornes. Stigmata linearia, brevia, stylos sequantia, per 
anthesin intra glumas erecta, nec exserta. 
Gramen indo-africanum aquaticum arundinaceum, glumis caudatis 
insigne. — Genus Ischzemo valde affine. 
1. V. procera Wall. et Griff. l. c. p. 573, (1836), tab. 23; Grant 
in Transact. Linn. Soc. 29, tab. 116; Ischemum cuspidatum Roxb. 
Fl. Ind. ed. Carey 1, p. 324. 
Perennis. Culmi inferne submersi v. fluitantes ad genieula radi- 
cantes, parte emersa erecta ultra 1 m. alta digiti erassitudine, teretes, 
elaberrimi, inferne ramos foliiferos, superne ramulum floriferum 
agentes. Folia glaucescentia: vaginæ lat, compressiuscul®, glabra, 
scaberul&, internodia superantes, summa cum lamina longa. Ligula 
brevissima, truncata, membranacea, longe ciliata et pilis intus stipata. 
Laminse e basi »quilata in vaginam defluente lineares, setaceo-acumi- 
nate, elongate, 60—100 em. longs, 10—15 mm. latæ, vernatione 
convoluta, adultze plane v. subeompliceatz, erecto-patule, rigidulz, 
subtus glaberrim&, supra pubescentes et scaberrimze, costa media 
crassissima multinervi obtusa supra late albo-lineata, nervisque late- 
ralibus crebris vix prominulis pereurs&. Racemi 2—6, secus rhacheos 
communis nodos circa 2 cm. distantes oppositi, 15—20 em. longi, erecto- 
patuli, strieti (v. ex Griff. subnutantes), robusti, pallidi; artieuli 
spicula sessili subduplo breviores, ea plus duplo angustiores, apice 
late elavati, dorso convexo costulato inferne scabri, ventre subexciso 
fere plani, marginibus aculeolato-scabris, disjuneti apice aculeolato- 
eiliolati. Spieulz sessiles eum callo angustissime annuliformi a reliqua 
' gluma rima profunda separato aculeolato-scabro (sed dempta cauda) 
10—11 mm. longi, late lanceolatze, cavum rhacheos undique super- 
antes ; gluma I"* cauda v. arista subulata 1,5—2 em. longa basi 1 mm. 
lata plana margine aculeolata subtus mediocostata rufescente ssepius 
undulata terminata, marginibus angustissime inflexa, flexuris superne 
aculeolato-seabris haud alatis, dorso nitidula, læviuscula, intus ultra 
20-nervis; II^ I= dempto acumine æquans, late ovata, navicularis, 
breviter mucronulata, in ?/, superiore acute carinata, carina superne 
sinuata aculeolato-scabra, 5-nervis, nervis anastomosantibus, glabra ; 
II: I^" zquans, lanceolata, acuta, marginibus anguste implicata, 
binervis, præter apicem puberulum glabra, paleam paullo breviorem 
lineari-oblongam obtusam glabram floremque c? antheris 4 mm. 
